参数资料
型号: SC16C650BIB48,151
厂商: NXP Semiconductors
文件页数: 4/48页
文件大小: 0K
描述: IC UART SINGLE W/FIFO 48-LQFP
产品培训模块: Stand-Alone UARTs
标准包装: 250
通道数: 1,UART
FIFO's: 32 字节
电源电压: 2.5V,3.3V,5V
带自动流量控制功能:
带IrDA 编码器/解码器:
带故障启动位检测功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP(7x7)
包装: 管件
SC16C650B_4
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04 — 14 September 2009
12 of 48
NXP Semiconductors
SC16C650B
UART with 32-byte FIFOs and IrDA encoder/decoder
6.7 Programmable baud rate generator
The SC16C650B supports high speed modem technologies that have increased input
data rates by employing data compression schemes. For example, a 33.6 kbit/s modem
that employs data compression may require a 115.2 kbit/s input data rate. A 128.0 kbit/s
ISDN modem that supports data compression may need an input data rate of 460.8 kbit/s.
A single baud rate generator is provided for the transmitter and receiver, allowing
independent TX/RX channel control. The programmable baud rate generator is capable of
accepting an input clock up to 48 MHz, as required for supporting a 3 Mbit/s data rate.
The SC16C650B can be congured for internal or external clock operation. For internal
clock oscillator operation, an industry standard microprocessor crystal (parallel resonant,
22 pF to 33 pF load) is connected externally between the XTAL1 and XTAL2 pins (see
Figure 5). Alternatively, an external clock can be connected to the XTAL1 pin to clock the
internal baud rate generator for standard or custom rates (see Table 5).
The generator divides the input 16
× clock by any divisor from 1 to (216 1). The
SC16C650B divides the basic crystal or external clock by 16. The frequency of the
BAUDOUT output pin is exactly 16
× (16 times) the selected baud rate
(BAUDOUT = 16
× baud rate). Customized baud rates can be achieved by selecting the
proper divisor values for the MSB and LSB sections of baud rate generator.
Setting MCR[7] to a logic 1 provides an additional divide-by-4, whereas setting MCR[7] to
a logic 0 only divides by 1 (see Table 5 and Figure 6).
Programming the baud rate generator registers DLM (MSB) and DLL (LSB) provides a
user capability for selecting the desired nal baud rate. The example in Table 5 shows
selectable baud rates when using a 1.8432 MHz crystal and setting MCR[7] to a logic 0.
For custom baud rates, the divisor value can be calculated using Equation 1:
(1)
Fig 5.
Crystal oscillator connection
002aaa870
C2
47 pF
XTAL1
XTAL2
X1
1.8432 MHz
C1
22 pF
C2
33 pF
XTAL1
XTAL2
1.5 k
X1
1.8432 MHz
C1
22 pF
divisor in decimal
()
XTAL1 clock frequency
serial data rate
16
×
----------------------------------------------------------------
=
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SC16C650BIB48-F 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH UART 32B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
SC16C650BIBS 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH UART 32B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
SC16C650BIBS,128 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
SC16C650BIBS,151 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
SC16C650BIBS,157 功能描述:UART 接口集成电路 16CB 2.5V-5V 1CH RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel